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78M6631 Datasheet Preview

78M6631 Datasheet

3-Phase PowerMeasurement

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Rev 3; 4/16
78M6631
3-Phase Power-
Measurement IC
DATA SHEET
DESCRIPTION
The Teridian78M6631 is a highly integrated 3-phase
power measurement and monitoring system-on-chip
(SoC), with a 10 MHz 8051-compatible MPU core and
Single Converter Technology® containing a 22-bit delta-
sigma converter and 32-bit compute engine (CE). The
78M6631 has been designed specifically for a wide variety
of applications requiring 3-phase power and quality
measurements. It supports both Delta and Wye
configurations.
At the measurement interface, the device provides six
analog inputs including three differential current and three
voltage for interfacing to current and voltage sensors. The
device provides better than 0.5% accuracy over a wide
2000:1 dynamic range.
The integrated MPU core and 128 KB of flash memory
provide a flexible means of configuration, post-processing,
data formatting, interfacing to host processor via a UART
or SPI interface, or using DIO pins for LEDs or relay
control. Complete firmware is available from Silergy and
can be loaded into the IC during manufacturing test.
FEATURES
< 0.5% Watt Accuracy Over 2000:1 Current
Range and Over Temperature
Exceeds IEC 62053/ANSI C12.20 Standards
Voltage Reference < 40 ppm/°C
Six Analog Inputs Supporting 3-Phase Voltage
and Current Measurement Inputs
Pin- or Biselectable Delta or Wye Configuration
22-Bit Delta-Sigma ADC with Independent 32-
Bit Compute Engine (CE)
8-Bit MPU (80515), One Clock Cycle per
Instruction with 4 KB MPU XRAM
128 KB Flash with Security
32 kHz Time Base with Hardware Watchdog
Timer
UART, I2C, and High-Speed Slave SPI Host
Interface Options
17 General-Purpose 5 V Tolerant I/O Pins
Packaged in a RoHS-Compliant (6/6)
Lead(Pb)-Free 56-Pin TQFN
Application Firmware Includes (per Phase):
o True RMS Current and Voltage
Calculations
o Active, Reactive, Apparent, Fundamental,
and Harmonic Power Calculations
o Fundamental and Harmonic Current and
Voltage Calculations
o Line Frequency and Power Factor
Calculations
o Phase Compensation (18at 60 Hz)
o Built-In Calibration Routines
o Programmable Alarm Thresholds
o Command Line (UART) Communications
o High-Speed SPI Communications
Teridian is a trademark and Single Converter Technology is a registered trademark of Silergy Corp
Rev 3
1




Silergy

78M6631 Datasheet Preview

78M6631 Datasheet

3-Phase PowerMeasurement

No Preview Available !

78M6631 Data Sheet
Table of Contents
1 Hardware Functional Description ..................................................................................................... 5
1.1 Hardware Overview ..................................................................................................................... 5
1.2 Device Reset................................................................................................................................ 7
1.3 Power Management..................................................................................................................... 7
1.3.1 Voltage Regulator ............................................................................................................ 7
1.3.2 Power Fault Management................................................................................................ 7
1.4 Analog Front-End (AFE) .............................................................................................................. 8
1.4.1 Analog Current and Voltage Inputs ................................................................................. 8
1.5 Digital Computation Engine (CE) ................................................................................................. 9
1.6 80515 MPU Core ....................................................................................................................... 10
1.6.1 SFRs .............................................................................................................................. 10
1.7 RAM ........................................................................................................................................... 10
1.8 IORAM ....................................................................................................................................... 10
1.9 Flash .......................................................................................................................................... 10
1.9.1 Program Security ........................................................................................................... 10
1.10 Oscillator .................................................................................................................................... 11
1.11 PLL and Internal Clock Generation............................................................................................ 11
1.12 Real-Time Clock (RTC).............................................................................................................. 11
1.13 Hardware Watchdog Timer ........................................................................................................ 11
1.14 Temperature Sensor .................................................................................................................. 12
1.15 General Purpose Digital I/O ....................................................................................................... 12
1.16 D/Y Selection Pin ....................................................................................................................... 12
1.17 EEPROM Interface .................................................................................................................... 12
1.18 SPI Slave Port............................................................................................................................ 12
1.19 Test Port..................................................................................................................................... 14
1.20 UART ......................................................................................................................................... 14
1.21 In Circuit Emulator (ICE) Port .................................................................................................... 14
2 Electrical Specifications................................................................................................................... 15
2.1 Absolute Maximum Ratings ....................................................................................................... 15
2.2 Recommended External Components....................................................................................... 16
2.3 Recommended Operating Conditions........................................................................................ 16
2.4 Performance Specifications ....................................................................................................... 17
2.4.1 Input Logic Levels .......................................................................................................... 17
2.4.2 Output Logic Levels ....................................................................................................... 17
2.4.3 Power-Fault Comparator ............................................................................................... 17
2.4.4 Power Supply Monitor.................................................................................................... 18
2.4.5 Supply Current ............................................................................................................... 18
2.4.6 Crystal Oscillator............................................................................................................ 18
2.4.7 Temperature Sensor ...................................................................................................... 19
2.4.8 VREF ............................................................................................................................. 19
2.4.9 ADC Converter, V3P3A Referenced.............................................................................. 20
2.5 Timing Specifications ................................................................................................................. 21
2.5.1
2.5.2
2.5.3
2.5.4
Flash Memory ................................................................................................................ 21
EEPROM Interface ........................................................................................................ 21
RESET ........................................................................................................................... 21
SPI Slave Port................................................................................................................ 22
3 Packaging .......................................................................................................................................... 23
3.1 56-Pin QFN Package ................................................................................................................. 23
3.2 Pinout ......................................................................................................................................... 23
3.2.1 56-Pin QFN Package Outline ........................................................................................ 24
3.2.2 Recommended PCB Land Pattern for the QFN-56 Package ........................................ 25
2 Rev 3


Part Number 78M6631
Description 3-Phase PowerMeasurement
Maker Silergy
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78M6631 Datasheet PDF






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